“One of the great mysteries is how do the roses stay on at the rose ceremonies,” Harrison jokes to PEOPLE of the men’s boutinnieres. Turns out, they’re outfitted with strong magnets to secure them to the guy’s lapels – and to save the Bachelorette from sticking herself with pins every week.

As for memorizing all of those names, the Bachelors and Bachelorettes don’t have any help. They “do it themselves,” says Harrison, and cocktail parties literally go “all night. Most of the time, we finish and the sun’s coming up.”

Not that Maynard was in danger of getting tipsy.

“Emily didn’t drink much,” says Harrison. “Maybe she didn’t drink at all that night. Then the contestants take their cues from [the Bachelors and Bachelorettes]. With Emily, everybody was really on their best behavior.”